ML19263E221
| ML19263E221 | |
| Person / Time | |
|---|---|
| Site: | Prairie Island  |
| Issue date: | 06/01/1979 |
| From: | Ward E NORTHERN STATES POWER CO. |
| To: | James Keppler NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III) |
| References | |
| NUDOCS 7906050324 | |
| Download: ML19263E221 (1) | |
Text
NORTHERN STATES POWER COMPANY M I N N E A PO LI S. M I N N E S OTA 55401 June 1, 1979 th: J G Keppler, Director, Region III Office of Inspection & Enforcement U S Nuclear Regulatory Commission 799 Roosevelt Road Glen Ellyn, 60137
Dear Mr Keppler:
PRAIRIE ISLAND NUCLEAR GENERATING PIANT Docket No. 50-282 License No. DPR-42 50-306 DPR-60 Environmental Event Report 79-04 Cooling Tower Operations - May Under TS B-5.4.2. A, we are furnishing two copics of this Environmental Event Report covering operation of the plant circulating water system in the partial recycle mode with daily average blowdown flow in excess of 150 cfs.
Daily average blowdown flow in excess of 150 cfs was required 17 days during the month of May discounting May 1 and 2 when prevailing high water conditions did not allow blowdown flow measurement (see EER 79-03).
The slightly higher flows were required to accommodate cooling tower
~
preventative magntenance and to maintain cooling water inlet temperatures at less than 85 F.
The maximum clevated flow of 284 cfs occurred on May 29.
Yours very truly, E C Ward, PE Manager - Nuclear Environmental Services 2294
_46 ECW/jh cc: Director, NRR c/o-DSB (17)
MPCA Atta: J W Ferman 7 00G05 0 '32 9 M
.